Prosthetic joints with contained compressible resilient members
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United States of America Patent
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Apr 5, 2005
Grant Date -
Feb 12, 2004
app pub date -
May 9, 2003
filing date -
Oct 8, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a total knee replacement (TKR), the use of a cushion element provides better wear characteristics than polyethylene ('poly') alone. Since a metal-on-metal, metal-on-ceramic, or ceramic-on-ceramic articulating surface has better wear characteristics than metal on poly, the invention essentially provides cushioning for metal/ceramic-on-metal/ceramic joint replacements. It also allows the use of elastomers for their cushioning properties rather than their surface wear and tensile strength characteristics. The contained compressible elements could also be used as a cushion below polyethylene components, polyethylene over metal components, unicondylar knee replacements, patellar components, and prosthetic components for other parts of the body, including the hip, elbow, shoulder, wrist, and ankle.
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